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Observational constraints on the dark energy and dark matter mutual coupling

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arxiv 0804.0110 v2 pith:IMMFUO3W submitted 2008-04-01 astro-ph gr-qchep-th

classification astro-phgr-qchep-th
keywords darkenergymattercouplingdatadifferentestimatesmeasurement
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We examine different phenomenological interaction models for Dark Energy and Dark Matter by performing statistical joint analysis with observational data arising from the 182 Gold type Ia supernova samples, the shift parameter of the Cosmic Microwave Background given by the three-year Wilkinson Microwave Anisotropy Probe observations, the baryon acoustic oscillation measurement from the Sloan Digital Sky Survey and age estimates of 35 galaxies. Including the time-dependent observable, we add sensitivity of measurement and give complementary results for the fitting. The compatibility among three different data sets seem to imply that the coupling between dark energy and dark matter is a small positive value, which satisfies the requirement to solve the coincidence problem and the second law of thermodynamics, being compatible with previous estimates.

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  1. The model-independent degeneracy-breaking point in cosmological models with interacting Dark Energy and Dark Matter

    astro-ph.CO 2019-08 conditional novelty 4.0 of 10

    In interacting dark energy models, the interaction term becomes independent of the constant dark energy equation of state at a specific redshift (about z=1.4), giving a point where the interaction can be observed with...

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